Table with repeating header and wrapping rows

\documentclass{report}
\usepackage{longtable,tabu}
\begin{document}
\begin{longtabu} to \textwidth {
X[1,c]
X[1,c]
X[1,c]
X[10,l]}
\hline \hline
\textbf{Time End of Step} &
\textbf{Step} &
\textbf{Event} &
\textbf{Description}
\\ \hline \hline \hline \hline
\endhead % all the lines above this will be repeated on every page
12:18:52 & 1 & 1 & this is a description for the event \\
12:18:52 & 1 & 1 & this is a description for the event \\
12:18:52 & 1 & 1 & this is a description for the event 1234567890x1234567890x123 4567890x1234567890x123456789 0x1234567890x1234 567890x1234567890x1234567890x1234567890x \\
12:18:52 & 1 & 1 & this is a description for the event \\
12:18:52 & 1 & 1 & this is a description for the event \\
12:18:52 & 1 & 1 & this is a description for the event 1234567890x1234567890x123 4567890x1234567890x123456789 0x1234567890x1234 567890x1234567890x1234567890x1234567890x \\
12:18:52 & 1 & 1 & this is a description for the event \\
12:18:52 & 1 & 1 & this is a description for the event \\
12:18:52 & 1 & 1 & this is a description for the event 1234567890x1234567890x123 4567890x1234567890x123456789 0x1234567890x1234 567890x1234567890x1234567890x1234567890x \\
12:18:52 & 1 & 1 & this is a description for the event \\
12:18:52 & 1 & 1 & this is a description for the event \\
12:18:52 & 1 & 1 & this is a description for the event 1234567890x1234567890x123 4567890x1234567890x123456789 0x1234567890x1234 567890x1234567890x1234567890x1234567890x \\
12:18:52 & 1 & 1 & this is a description for the event \\
12:18:52 & 1 & 1 & this is a description for the event \\
12:18:52 & 1 & 1 & this is a description for the event 1234567890x1234567890x123 4567890x1234567890x123456789 0x1234567890x1234 567890x1234567890x1234567890x1234567890x \\
12:18:52 & 1 & 1 & this is a description for the event \\
12:18:52 & 1 & 1 & this is a description for the event \\
12:18:52 & 1 & 1 & this is a description for the event 1234567890x1234567890x123 4567890x1234567890x123456789 0x1234567890x1234 567890x1234567890x1234567890x1234567890x \\
12:18:52 & 1 & 1 & this is a description for the event \\
12:18:52 & 1 & 1 & this is a description for the event \\
12:18:52 & 1 & 1 & this is a description for the event 1234567890x1234567890x123 4567890x1234567890x123456789 0x1234567890x1234 567890x1234567890x1234567890x1234567890x \\
12:18:52 & 1 & 1 & this is a description for the event \\
12:18:52 & 1 & 1 & this is a description for the event \\
12:18:52 & 1 & 1 & this is a description for the event 1234567890x1234567890x123 4567890x1234567890x123456789 0x1234567890x1234 567890x1234567890x1234567890x1234567890x \\
12:18:52 & 1 & 1 & this is a description for the event \\
12:18:52 & 1 & 1 & this is a description for the event \\
12:18:52 & 1 & 1 & this is a description for the event 1234567890x1234567890x123 4567890x1234567890x123456789 0x1234567890x1234 567890x1234567890x1234567890x1234567890x \\
12:18:52 & 1 & 1 & this is a description for the event \\
12:18:52 & 1 & 1 & this is a description for the event \\
12:18:52 & 1 & 1 & this is a description for the event 1234567890x1234567890x123 4567890x1234567890x123456789 0x1234567890x1234 567890x1234567890x1234567890x1234567890x \\
12:18:52 & 1 & 1 & this is a description for the event \\
12:18:52 & 1 & 1 & this is a description for the event \\
12:18:52 & 1 & 1 & this is a description for the event 1234567890x1234567890x123 4567890x1234567890x123456789 0x1234567890x1234 567890x1234567890x1234567890x1234567890x \\
12:18:52 & 1 & 1 & this is a description for the event \\
12:18:52 & 1 & 1 & this is a description for the event \\
12:18:52 & 1 & 1 & this is a description for the event 1234567890x1234567890x123 4567890x1234567890x123456789 0x1234567890x1234 567890x1234567890x1234567890x1234567890x \\
12:18:52 & 1 & 1 & this is a description for the event \\
12:18:52 & 1 & 1 & this is a description for the event \\
12:18:52 & 1 & 1 & this is a description for the event 1234567890x1234567890x123 4567890x1234567890x123456789 0x1234567890x1234 567890x1234567890x1234567890x1234567890x \\
12:18:52 & 1 & 1 & this is a description for the event \\
12:18:52 & 1 & 1 & this is a description for the event \\
12:18:52 & 1 & 1 & this is a description for the event 1234567890x1234567890x123 4567890x1234567890x123456789 0x1234567890x1234 567890x1234567890x1234567890x1234567890x \\
12:18:52 & 1 & 1 & this is a description for the event \\
12:18:52 & 1 & 1 & this is a description for the event \\
12:18:52 & 1 & 1 & this is a description for the event 1234567890x1234567890x123 4567890x1234567890x123456789 0x1234567890x1234 567890x1234567890x1234567890x1234567890x \\
12:18:52 & 1 & 1 & this is a description for the event \\
12:18:52 & 1 & 1 & this is a description for the event \\
12:18:52 & 1 & 1 & this is a description for the event 1234567890x1234567890x123 4567890x1234567890x123456789 0x1234567890x1234 567890x1234567890x1234567890x1234567890x \\
12:18:52 & 1 & 1 & this is a description for the event \\
12:18:52 & 1 & 1 & this is a description for the event \\
12:18:52 & 1 & 1 & this is a description for the event 1234567890x1234567890x123 4567890x1234567890x123456789 0x1234567890x1234 567890x1234567890x1234567890x1234567890x \\
12:18:52 & 1 & 1 & this is a description for the event \\
12:18:52 & 1 & 1 & this is a description for the event \\
12:18:52 & 1 & 1 & this is a description for the event 1234567890x1234567890x123 4567890x1234567890x123456789 0x1234567890x1234 567890x1234567890x1234567890x1234567890x \\
\end{longtabu}
\end{document}